target/arm/gdbstub64.c

   1 /*
   2  * ARM gdb server stub: AArch64 specific functions.
   3  *
   4  * Copyright (c) 2013 SUSE LINUX Products GmbH
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "qemu/osdep.h"
  20 #include "qemu-common.h"
  21 #include "cpu.h"
  22 #include "exec/gdbstub.h"
  23
  24 int aarch64_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  25 {
  26     ARMCPU *cpu = ARM_CPU(cs);
  27     CPUARMState *env = &cpu->env;
  28
  29     if (n < 31) {
  30         /* Core integer register.  */
  31         return gdb_get_reg64(mem_buf, env->xregs[n]);
  32     }
  33     switch (n) {
  34     case 31:
  35         return gdb_get_reg64(mem_buf, env->xregs[31]);
  36     case 32:
  37         return gdb_get_reg64(mem_buf, env->pc);
  38     case 33:
  39         return gdb_get_reg32(mem_buf, pstate_read(env));
  40     }
  41     /* Unknown register.  */
  42     return 0;
  43 }
  44
  45 int aarch64_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  46 {
  47     ARMCPU *cpu = ARM_CPU(cs);
  48     CPUARMState *env = &cpu->env;
  49     uint64_t tmp;
  50
  51     tmp = ldq_p(mem_buf);
  52
  53     if (n < 31) {
  54         /* Core integer register.  */
  55         env->xregs[n] = tmp;
  56         return 8;
  57     }
  58     switch (n) {
  59     case 31:
  60         env->xregs[31] = tmp;
  61         return 8;
  62     case 32:
  63         env->pc = tmp;
  64         return 8;
  65     case 33:
  66         /* CPSR */
  67         pstate_write(env, tmp);
  68         return 4;
  69     }
  70     /* Unknown register.  */
  71     return 0;
  72 }